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Q.

Assertion: Carbon reacts with oxygen to form carbon dioxide which is acidic oxide.

Reason: Non-metals form acidic oxides.

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a

Assertion is true but Reason is false

b

Both Assertion and Reason are true and Reason is the correct explanation of the Assertion.

c

Assertion is false but Reason is true 

d

Both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.

answer is A.

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Detailed Solution

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Both Assertion and Reason are true, and Reason is the correct explanation of the Assertion.

Assertion: When carbon burns in the presence of oxygen, carbon dioxide (CO2), an acidic oxide, is created. Hence carbon in its aqueous solution turns blue litmus into red. 
C+ O2CO2

Reason: Non-metallic oxides have an acidic character. When dissolved in water, they produce an acidic solution that turns the blue litmus solution red. Carbonic acid (H2CO3 ) and sulphuric acid, for instance, react with water when non-metal oxides like CO2 and SO2 are present (H2SO4).

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